Black Mica Muscovite 12mm Round - 15-16 Inch Size_3-9mm making it the hardest silicate

making it the hardest silicate mineral

red and brown

and because its hardness has made the stone perfect for beads and cabochons

their water god

and it constitutes a major portion of many of the earth's rocks

Black Mica Muscovite 12mm Round - 15-16 Inch Size_3-9mm making it the hardest silicateMica is a mineral name given to a group of minerals that are physically and chemically similar. They are all silicate minerals, known as sheet silicates because they form in distinct layers. Micas are fairly light and relatively soft, and the sheets and flakes of mica are flexible. Mica is heat resistant and does not conduct electricity. There are 37 different mica minerals. The most common include: purple lepidolite, black biotite, brown phlogopite